1、BRITISH STANDARD BSENISO19125-1:2006IncorporatingAmendment No. 1( r enumbers BS ISO 19125-1:2004 as BS EN ISO 19125-1:2006)Geographicinformation Simple feature accessPart 1: Common architectureICS 35.240.70nullnull nullnullnullnullnullnullnull nullnullnullnullnullnullnull nullnullnull nullnullnullnu
2、llnullnullnullnullnullnull nullnullnullnullnullnull nullnull nullnullnullnullnullnullnullnullnull nullnull nullnullnullnullnullnullnullnullnull nullnullnulland incorporating corrigendum May2014National forewordThis British Standard is the UK implementation of EN ISO 19125-1:2006.It is identical to I
3、SO 19125-1:2004.The UK participation in its preparation was entrusted to Technical Committee IST/36, Geographic information.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a
4、 contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.BS EN ISO 19125-1:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on8 February 2005Amendments/corri
5、genda issued since publicationAmd. No. Date Comments 16388 August 2006 Renumbers BS ISO 19125-1:2004 as BS EN ISO 19125-1:200631 May 2014 CEN adoption page, Foreword and Endorsement insertedISBN 978 0 580 86310 3 The British Standards Institution 2014. Published by BSI Standards Limited 2014EUROPEAN
6、STANDARDNORMEEUROPENNEEUROPISCHENORMENISO19125-1March 2006ICS 35.240.70EnglishVersionGeographicinformation-Simplefeatureaccess -Part 1:Commonarchitecture(ISO19125-1:2004)Informationgographique-Accs aux entits simples -Partie1:Architecturecommune(ISO19125-1:2004)Geoinformation-Simplefeatureaccess-Tei
7、l1:GemeinsameArchitektur (ISO19125-1:2004)This EuropeanStandard was approvedby CENon16 February 2006.CENmembers arebound tocomply with theCEN/CENELECInternalRegulations which stipulate theconditions for giving this EuropeanStandard the status ofanational standard without any alteration.Up-to-datelis
8、ts andbibliographical references concerning suchnationalstandards may beobtainedonapplication to theCentralSecretariat or toany CENmember.This EuropeanStandardexists in threeofficial versions (English,French,German).A versioninany other languagemadeby translationunder the responsibilityofaCENmemberi
9、ntoitsownlanguageandnotifiedtotheCentralSecretariat has the same status as theofficialversions.CENmembers arethenationalstandardsbodies ofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Nor
10、way,Poland,Portugal,Romania,Slovakia,Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom.EUROPEAN COMMITTEE FORSTANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FRNORMUNGManagement Centre: ruedeStassart, 36 B-1050 Brussels 2006 CEN All rights ofexploitationinany formandby any means rese
11、rvedworldwidefor CENnationalMembers.Ref.No.ENISO19125-1:2006:E ISO 4002 All irthgs erse.devr lnUeto sswrehise specified, on trap fo this lbupictaionmaeb y cudorperro de tuilizi den yna form ro na ybm ynae,slecetrinoc ro mecinahcal, inclidung tohpcoiypodna gn micrfoilm, wittuoh repmissii non writign
12、from ietI rehSa Ot tsserdda eh eb olw orISOs memreb i ydobn the cnuotrfo yttseuqer ehe.rISO cirypothg foficesaCe tsopale 65 null eneG 1121-HC 02 avleT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mail coirypthgiso.o grWe bwww.is.o groPulbisdehi n Switlrez dnaii ISO 4002 Allr ithgsr esedevr) R U H Z R
13、 U G7 KH W H W R I , 62 null nullnull nullnull nullnullnull K D V E HHQSU H S D U H GE 7 H F K Q L FDO b) syntax and functionality provided for defining functions; c) physical storage of type instances in the database; d) specific terminology used to refer to User Defined Types, for example UDT. Thi
14、s part of ISO 19125 does standardize names and geometric definitions for Types for Geometry.This part of ISO 19125 does not place any requirements on how to define the Geometry Types in the internal schema nor does it place any requirements on when or how or who defines the Geometry Types. 2 Conform
15、ance In order to conform to this part of ISO 19125, an implementation shall satisfy the requirements of one or moretest suites specified in the other parts of ISO 19125. 3 Normative referencesThe following referenced documents are indispensable for the application of this document. For datedreferenc
16、es, only the edition cited applies. For undated references, the latest edition of the referenceddocument (including any amendments) applies. ISO 19107:2003, Geographic information null Spatial schemaISO 19111:2003, Geographic information null Spatial referencing by coordinates4 Terms and definitions
17、 For the purposes of this document, the following terms and definitions apply.4.1boundaryset that represents the limit of an entityBS EN ISO 19125-1:2006 ISO 19125-1:2004 (E)2NOTE Boundary is most commonly used in the context of geometry, where the set is a collection of points or acollection of obj
18、ects that represent those points. In other arenas, the term is used metaphorically to describe the transitionbetween an entity and the rest of its domain of discourse.ISO 191074.2buffergeometric object (4.14) that contains all direct positions (4.7) whose distance from a specified geometricobject is
19、 less than or equalto a given distanceISO 191074.3coordinateone of a sequence of n -numbers designating the position of a point (4.17) in n -dimensional spaceNOTE In a coordinate reference system, the numbers must be qualified by units.adapted from ISO 191114.4coordinate dimensionnumber ofmeasuremen
20、ts or axes needed to describe a position in a coordinate system (4.6)ISO 191074.5coordinate referencesystemcoordinate system (4.6) thatis related to the realworld by a datumadapted from ISO 191114.6coordinate systemset of mathematical rules for specifying howcoordinates (4.3) are to be assigned topo
21、int (4.17)ISO 191114.7curve1-dimensional geometric primitive (4.15), representing the continuous image of a lineNOTE The boundary of a curve is the set of points at either end of the curve. If the curve is a cycle, the two ends areidentical, and the curve (if topologically closed) is considered to n
22、ot havea boundary. The first point is called the startpoint, and the last is the endpoint. Connectivity of the curve is guaranteed by the “continuous image of a line” clause.A topological theorem states that a continuous image of a connected set is connected.ISO 191074.7direct positionposition descr
23、ibed by a single set ofcoordinates (4.3) within acoordinate reference system (4.5)ISO 191074.9end point last point (4.17) of a curve (4.7)ISO 19107BS EN ISO 19125-1:2006 ISO 19125-1:2004 (E)I SO 4002 All irthgs ersedevr 34.10exterior difference between the universe and the closure NOTE The concept o
24、f exterior is applicable to both topological and geometric complexes. ISO 19107 4.11feature abstraction of real world phenomena NOTE A feature may occur as a type or an instance. Feature type or feature instance is used when only one is meant.adapted from ISO 19101 4.12feature attribute characterist
25、ic of a feature (4.11)NOTE A feature attribute has a name, a data type, and a value domain associated to it. A feature attribute for afeature instance also has an attribute value taken from the value domain. adapted from ISO 19101 4.13geometric complex set of disjoint geometric primitives (4.15) whe
26、re the boundary (4.1) ofeach geometric primitive can berepresented as the union of other geometric primitives of smaller dimension within the same set NOTE The geometric primitives in the set are disjoint in the sense that no direct position is interior to more than onegeometric primitive. The set i
27、s closed under boundary operations, meaning that for each element in the geometric complex,there is a collection (also a geometric complex) of geometric primitives that represents the boundary of that element.Recall that the boundary of apoint (the only 0D primitive object type in geometry) is empty
28、. Thus, if the largest dimensiongeometric primitive is a solid (3D), the composition of the boundary operator in this definition terminates after at most3 steps. It is also the case that the boundary of any object is a cycle. ISO 19107 4.14geometric object spatial object representing a geometric set
29、 NOTE A geometric object consists of a geometric primitive, a collection of geometric primitives, or a geometriccomplex treated as a single entity. A geometric object may be the spatial representation of an object such as a feature or asignificant part of a feature. ISO 19107 4.15geometric primitive
30、 geometric object (4.14) representing a single, connected, homogeneous element of space NOTE Geometric primitives are non-decomposed objects that represent information about geometric configuration.They include points, curves, surfaces, and solids. ISO 19107 BS EN ISO 19125-1:2006 ISO 19125-1:2004 (
31、E)44.16interiorset of alldirect positions (4.7) that are on a geometric object (4.14) but which are not on itsboundary (4.1)NOTE The interior of a topological object is the homomorphic image of the interior of any of its geometric realizations.This is not included as a definition because it follows
32、from a theorem of topology.ISO 191074.17point0-dimensional geometric primitive (4.15), representing a positionNOTE The boundary of a point is theempty set.ISO 191074.18simple featurefeature (4.11) restrictedto 2D geometrywith linear interpolation between vertices, havingboth spatialandnon spatial at
33、tributes4.19start point first point (4.17) of a curve (4.7)ISO 191074.20surface2-dimensional geometric primitive (4.15), locally representing a continuous image of a regionof a planeNOTE The boundary of a surface is the set of oriented, closed curves that delineate the limits of the surface.adapted
34、from ISO 191075 AbbreviatedtermsAPI Application Program InterfaceCOMComponent Object ModelCORBA Common Object Request Broker ArchitectureDCE Distributed Computing EnvironmentDCOMDistributed Component Objected ModelDE-9IM Dimensionally Extended Nine-Intersection ModelIEEEInstitute of Electrical andEl
35、ectronics Engineers, Inc.NDR Little Endianbyte order encodingOLEObjectLinking and EmbeddingRPC Remote Procedure CallSQLStructured Query LanguageBS EN ISO 19125-1:2006 ISO 19125-1:2004 (E)I SO 4002 All irthgs ersedevr 5SRID Spatial Reference System IdentifierXDR Big Endian byte order encoding UDT Use
36、r Defined TypeUML Unified Modeling LanguageWKBWell-Known Binary (representation for example, geometry)6 Architecture 6.1Geometry object model 6.1.1 OverviewThis subclause describes the object model for simple feature geometry. The simple feature geometry objectmodel is Distributed Computing Platform
37、 neutral and us es UML notation. The object model for geometry is shown in Figure 1. The base Geometry class has subclasses for Point, Curve, Surface andGeometryCollection. Each geometric object is associated with a Spatial Reference System, whichdescribes the coordinate space in which the geometric
38、 object is defined. Figure 1 Geometry class hierarchyFigure 1 is based on an extended Geometry model with specialized 0-, 1- and 2-dimensional collectionclasses named MultiPoint, MultiLineString and MultiPolygon for modelling geometries corresponding tocollections of Points, LineStrings and Polygons
39、, respectively. MultiCurve and MultiSurface are introduced asabstract superclasses that generalize the collection interfaces to handle Curves and Surfaces. Figure 1 shows aggregation lines between the leaf-collection classes and their element classes; the aggregation lines fornon-leaf-collection cla
40、sses are described in the text. BS EN ISO 19125-1:2006 ISO 19125-1:2004 (E)6The attributes, methods and assertions for each Geometry class aredescribedbelow. In describing methods,this is used to refer to the receiver of the method (the object being messaged).6.1.2 Geometry6.1.2.1 DescriptionGeometr
41、yis the root class of the hierarchy. Geometryis an abstract (non-instantiable) class.The instantiable subclasses of Geometry defined in this International Standard are restricted to 0, 1 and2-dimensional geometric objects that exist in 2-dimensional coordinate space ( null 2 ).All instantiable Geome
42、try classes described in this part of ISO 19125 are defined so that validinstances of a Geometry class are topologically closed, i.e. alldefined geometries include their boundary.6.1.2.2 Basic methods on geometric objectsnull Dimension ():Integer The inherent dimension of this geometric object, whic
43、h must be less than orequalto the coordinate dimension. This specification is restricted to geometries in 2-dimensionalcoordinate space.null GeometryType ():String Returns the name of the instantiable subtype of Geometryof which thisgeometric object is a instantiable member.The name of the subtypeof
44、 Geometryis returned as a string.null SRID ( ):Integer Returns the Spatial Reference System ID forthis geometric object.null Envelope():Geometry The minimum bounding box for this Geometry, returnedas a Geometry. Thepolygon is defined by the corner points of the bounding box null (MINX, MINY), (MAXX,
45、 MINY), (MAXX,MAXY), (MINX, MAXY), (MINX, MINY)null .null AsText():String Exports this geometric object to a specific Well-knownText RepresentationofGeometry.null AsBinary():Binary Exports this geometric object to a specific Well-knownBinaryRepresentationofGeometry.null IsEmpty ():Integer Returns 1
46、(TRUE) if this geometric object is the empty Geometry. If true, then thisgeometric object represents the empty point set, null , for the coordinate space.null IsSimple():Integer Returns 1 (TRUE) if this geometric object has no anomalous geometric points,such as self intersection or self tangency. Th
47、e description of each instantiable geometric class will includethe specific conditions that cause an instance of that class to be classified as not simple.null Boundary():Geometry Returns the closure of the combinatorial boundaryof this geometric object(Reference1, section 3.12.2).Because the result
48、 of this functionis a closure, and hence topologicallyclosed, the resulting boundary can be represented using representational Geometryprimitives(Reference 1, section 3.12.2).6.1.2.3 Methods for testing spatial relations between geometric objectsThemethods in this subclause are defined and described
49、 in more detail following the description of the sub-types of Geometry.null Equals(anotherGeometry:Geometry):Integer Returns 1 (TRUE) if this geometric object is “spatiallyequal” to anotherGeometry.null Disjoint(anotherGeometry:Geometry):Integer Returns 1 (TRUE) if this geometric object is “spatiallydisjoint” from anotherGeometry.BS EN ISO 19125-1:2006 ISO 19125-1:2004 (E)I SO 4002 All irthgs ersedevr 7null Intersects (anotherGeometry:Geometr
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